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<head>
    <meta charset="UTF-8">
    <title>课程表</title>
</head>
<body>
<center>
    <h1>课程表</h1>
    <table border="1">
    <tr>
        <td></td>
        <td>星期1</td>
        <td>星期2</td>
        <td>星期3</td>
        <td>星期4</td>
        <td>星期5</td>
    </tr>
    <tr>
        <td rowspan="4">上午</td>
        <td>数学</td>
        <td>数学</td>
        <td>数学</td>
        <td>数学</td>
        <td>数学</td>
    </tr>
    <tr>
        <td>数学</td>
        <td>数学</td>
        <td>数学</td>
        <td>数学</td>
        <td>数学</td>
    </tr>
    <tr>
        <td>数学</td>
        <td>数学</td>
        <td>数学</td>
        <td>数学</td>
        <td>数学</td>
    </tr>
    <tr>
        <td>数学</td>
        <td>数学</td>
        <td>数学</td>
        <td>数学</td>
        <td>数学</td>
    </tr>
    <tr>
        <td colspan="6" align="center">午休</td>

    </tr>
    <tr>
        <td rowspan="4">下午</td>
        <td>数学</td>
        <td>数学</td>
        <td>数学</td>
        <td>数学</td>
        <td>数学</td>
    </tr>
    <tr>
        <td>数学</td>
        <td>数学</td>
        <td>数学</td>
        <td>数学</td>
        <td>数学</td>
    </tr>
    <tr>
        <td>数学</td>
        <td>数学</td>
        <td>数学</td>
        <td>数学</td>
        <td>数学</td>
    </tr>
    <tr>
        <td>数学</td>
        <td>数学</td>
        <td>数学</td>
        <td>数学</td>
        <td>数学</td>
    </tr>
    </table>
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